Resonant pulsator with mechanical actuator. Possible test frequencies are from 12 to 83 Hz. Test machine is suitable for force controlled fatigue tests of larger samples thanks to the size and stiffness of frame. Dynamic load can be up to 30 kN and mean load up to 36 kN. The pulsator is dedicated for fatigue crack propagation tests of flat specimens (push/pull or push/push tests) or 3 point bending test specimens.